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Learn what the P0303 diagnostic trouble code means and how to troubleshoot a misfire in cylinder 3 of your engine with AutoZone.
- What Does The P0303 Code Mean?
- P0303 Trouble Code Symptoms
- Causes of The P0303 Code
- How Serious Is The P0303 Code?
- What Repairs Can Fix The P0303 Code?
- Common P0303 Diagnosis Mistakes
- How to Diagnose The P0303 Trouble Code
- Estimated Cost of Repair
- Mechanics Tips About The P0303 Code
P0303 DTC means that there’s an engine misfire in cylinder 3. The Powertrain Control Module (PCM) detects that a misfire is occurring in the 3rd cylinder in the car motor and alerts the engine to set this trouble code. It’s a generic code, applying to all OBD-II equipped models. While the P0303 trouble code might be considered generic, the repairs ...
If one of the engine cylinders is misfiring, you should notice some performance issues. Additionally, the Check Engine Light will come onwhen the code is set, alerting you to the problem. Here are some of the top symptoms you’ll notice with the P0303 DTC. 1. Check Engine Light 2. Rough idle 3. Hard starts 4. Jerking during idle or driving 5. Loss o...
When the car engine is misfiring, it can be caused by a number of problems. In some cases, the issues could stem from the ignition system, but it’s also possible that something has failed with the fuel system. Here are some of the most common causes of the P0303 trouble code. 1. Fouled spark plug 2. Faulty Ignition Coil 3. Defective coil pack/wires...
Severe – The P0303 DTC is considered one that should be taken seriously. Driving with an engine misfirecan become dangerous, especially if the car starts to stall in the middle of the road. If the engine stalls, it might be difficult to get it started back up, leaving you in a hazardous situation. It’s important to have the P0303 trouble code exami...
You must perform a complete diagnosis before you attempt any repairs. Otherwise, you could spend unnecessary money on parts that aren’t needed. Based on what fails most often, here are a few of the fixes that might be in order. 1. Replace spark plug 2. Replace ignition coil/wires 3. Install a new fuel injector 4. Fix leaking valve 5. Fix vacuum lea...
Most commonly, the spark plugs, ignition coils, wires, or coil pack are going to be to blame for the misfire. However, you should never assume that’s the problem without first performing the diagnostic steps I outline below. You want to perform a visual check of the plugs, wires, coils, and coil pack before replacing any parts. If these parts look ...
As a professional mechanic, you want to follow a laid-out plan when diagnosing the P0303 code. Gathering the code from the scanner is just the first step of figuring out what’s wrong. With the right steps, you will have a definitive answer to the problem. Here are the most common diagnostic steps for the P0303 DTC. 1. Collect the trouble codes with...
Depending on what’s causing the problem, you are looking at a varying amount of repair costs. Some issues are going to cost far less than others to fix. Below, I list a few of the most common repairs and the average cost for parts and labor. 1. Replace spark plug – $40-$350 2. Replace ignition coils/wires – $75-$400 3. Install a new fuel injector –...
If you find that the cylinder 3 spark plug is causing the p0303 code, you could simply replace that plug and move on. However, it’s always a better idea to replace all of the plugs at the same time. If one is failing, the others are probably shortly behind. Plus, by replacing the spark plugs all at once, you can stay on a recommended maintenance sc...
Jun 4, 2021 · Code P0303 stands for “Cylinder 3 Misfire Detected” which indicates that there have been numerous misfires in engine cylinder 3. P0303 is typically caused by problems with the ignition system, faulty fuel injectors, or damage to the engine. The most common symptoms of a P0303 are a lit check engine light, acceleration issues, and poor ...
Mar 24, 2022 · P0303 definition: Cylinder 3 misfire detected. Issue Severity: SEVERE – Stop driving immediately. Repair Urgency: Fix this code immediately (same-day if possible) to avoid ignition failure, catalytic converter damage, and dangerous conditions. Diagnosis: A cylinder 3 misfire can be caused by anything from faulty spark plugs to low engine ...
Jul 24, 2024 · Download Article. The P0303 code indicates your 3 cylinder is misfiring. A misfire occurs when one of the cylinders inside of your engine doesn’t fire because something is off in the fuel-air-spark ratio. In the case of P0303, your engine control module (ECM) or powertrain control module (PCM) has detected multiple misfires in your 3 cylinder.
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P0303 is a diagnostic trouble code (DTC) for "Cylinder 3 Misfire Detected". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .
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Mar 13, 2024 · Diagnostic trouble codes, like the P0303, indicate which cylinder is experiencing the misfire. In this case, cylinder 3 is the culprit. To understand the P0303 trouble code, you must delve into the potential causes of a misfire in cylinder 3. Common culprits include faulty spark plugs, ignition coils, fuel injectors, or compression issues.
